HexChat 2.11.0 Server Name path traversal

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.0$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as critical, was found in HexChat 2.11.0. Affected is an unknown function of the component Server Name Handler. Such manipulation leads to path traversal. This vulnerability is listed as CVE-2016-2087. The attack may be performed from remote. In addition, an exploit is available.

Detailsinfo

A vulnerability was found in HexChat 2.11.0 (Chat Software) and classified as critical. Affected by this issue is some unknown functionality of the component Server Name Handler. The manipulation with an unknown input leads to a path traversal vulnerability. Using CWE to declare the problem leads to CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. Impacted is confidentiality, and integrity. CVE summarizes:

Directory traversal vulnerability in the client in HexChat 2.11.0 allows remote IRC servers to read or modify arbitrary files via a .. (dot dot) in the server name.

The bug was discovered 04/05/2016. The weakness was presented 01/18/2017 by PizzaHatHacker as EDB-ID 39656 as confirmed exploit (Exploit-DB). The advisory is shared for download at exploit-db.com. This vulnerability is handled as CVE-2016-2087 since 01/27/2016. The attack may be launched remotely. No form of authentication is required for exploitation. Technical details are unknown but a public exploit is available. The MITRE ATT&CK project declares the attack technique as T1006.

A public exploit has been developed by PizzaHatHacker and been published even before and not after the advisory. The exploit is available at exploit-db.com. It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 289 days. During that time the estimated underground price was around $0-$5k.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the databases at Exploit-DB (39656) and SecurityFocus (BID 95881†). See VDB-95469 for similar entry. Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.1
VulDB Meta Temp Score: 6.0

VulDB Base Score: 4.8
VulDB Temp Score: 4.6
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.4
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Path traversal
CWE: CWE-22
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Author: PizzaHatHacker
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Exploit-DB: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

01/27/2016 🔍
04/04/2016 +68 days 🔍
04/04/2016 +0 days 🔍
04/05/2016 +1 days 🔍
01/18/2017 +288 days 🔍
01/18/2017 +0 days 🔍
01/19/2017 +1 days 🔍
01/31/2017 +12 days 🔍
05/13/2026 +3389 days 🔍

Sourcesinfo

Advisory: EDB-ID 39656
Researcher: PizzaHatHacker
Status: Confirmed

CVE: CVE-2016-2087 (🔍)
GCVE (CVE): GCVE-0-2016-2087
GCVE (VulDB): GCVE-100-95468
SecurityFocus: 95881 - HexChat 'src/common/text.c' Directory Traversal Vulnerability
OSVDB: - CVE-2016-2087 - HexChat - Directory Traversal Issue

scip Labs: https://www.scip.ch/en/?labs.20161013
See also: 🔍

Entryinfo

Created: 01/19/2017 09:38
Updated: 05/13/2026 14:26
Changes: 01/19/2017 09:38 (68), 07/24/2020 12:55 (5), 01/16/2025 06:10 (16), 05/13/2026 14:26 (1)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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